Roof ventilator



March 7, 1961 J. c. FLANAGAN ROOF VENTILATOR Filed July 29, 1957 ATTowEvs.

ROOF VENTILATOR John C. Flanagan, 97 Ellsworth Ave Toronto, Ontario, Canada Filed July 29, 1957, Ser. No. 674,732

8 Claims. (CI. 98-42) This invention relates to a roof ventilator and in particular to that type of roof ventilator which is adapted to fit flush on a sloping roof.

It is a recognized fact that it is essential to ventilate the area of a house or building which lies between the uppermost ceiling and the roof hereinafter referred to as the attic. However, the roof ventilators presently obtainable have a number of disadvantages some of which are their inability to prevent moisture flowing into the attic or create -a turbulence which may be responsible for the entrance of dust or snow, under some conditions, to the attic.

The object of the present invention is to overcome the disadvantages of the present type of roof ventilators, one of which is to provide a roof ventilator of the present invention which is so constructed as to prevent the entrance of rain and snow and which will be quite inconspicuous.

A further object of the invention is to provide a ventilator so constructed as to avoid air turbulence which might be responsible for the entrance of dust and fine snow under some conditions.

Other and further objects and advantages of the present invention will be apparent from the following description and illustrated in the accompanying drawings in which:

Figure l is a perspective view showing my roof ventilator mounted on a sloping roof;

Figure 2 is a cross-sectional view on the line 2-2 Figure 1; and

Figure 3 is a-cross-scctional view on the line 3-3 Figure 2.

The roof ventilator of the present invention comprises a flat panel 10, made of metal, preferably sheet aluminum because of its light weight and its desirable weather properties, a triangular duct 11 secured to the underside of the panel 10. The panel is formed with a series of louvers 12 opening upwards, hereinafter referred to as inverted louvers and one louver 13 opening downwards, hereinafter referred to as a non-inverted louver, the louver 13 being positioned below the lowermost inverted louver -12 so that it forms the bottom opening of the ventilator through which any water admitted through the inverted louvers may be discharged to the roof below the inverted louvers as hereinafter described. Extending cross-wise of the panel 10 immediately above the uppermost louver 12 is a baffle 14 which prevents any water or snow from the roof above entering the inverted louvers. Extending across the panel 10 immediately below the downwardly opening louver 13 is a baflie 15 which deflects the air currents, flowing from the roof lower horizontal edge to the ridge of the roof, over the inverted louvers. The duct 11 is formed with the narrow end 16 adjacent to and below non-inverted louver 13 which forms an outlet for the duct and the wide open end 17 is adjacent the uppermost inverted louver 12,

said open end 17 forming an air inlet communicating with the attic. The open end 17 is covered by a screen nited States Patent 18. Secured to the underside of the panel 10, behind the inverted louvers 12 is a screen 19 which prevents the entrance of leaves and other debris into the duct 11. Instead of mounting the screen to the underside of the sheet, it may be mounted over the top of the louvers.

The bottom 20 of the duct 11 when mounted in position has a downward slope, the declivity being such that any moisture which is admitted to the duct through the inverted louvers will flow out through non-inverted louver The amount of ventilation required is gained by the number of louvers, and the size of the duct 11 is in direct proportion to the number of louvers.

A ventilator constructed in accordance with the foregoing disclosure has the advantages of being quite inconspicuous, obtains the desired amount of ventilation, is simple in construction, has a low cost of manufacture, and it is weather proof.

While I have disclosed a preferred embodiment of my invention, it is to be understood that the same is only by way of illustration the construction and use of the same.

What I claim as new and desire to protect by Letters Patent of the United States is:

1. A ventilator for use on a sloping roof comprising a substantially rectangular panel including an upper edge and a lower edge, adapted to lie flush upon the upper surface of the roof, with the upper edge parallel with the ridge of the roof and closer thereto than the lower edge when said panel is in an operative position, said panel having at least one elongate struckup portion forming a louver consisting of an upper wall, the plane of which is directed upwardly toward the upper edge of said panel to form a deflector over the opening for-med by the struckup portion, tending to prevent entry of snow and the like into the opening when blown upwardlyalong the roof, and a duct depending from said panel and underlying said louver; said duct comprising, triangular shaped sidewalls depending from said panel, a downwardly and forwardly inclined bottom wall merging with said panel adjacent its lower edge, an. open wall at the opposite end thereof, and a front discharge opening adjacent said merged panel and bottom wall to enable draining onto the roof of any liquid flowing on said bottom wall.

2. A roof ventilator according to claim 1 wherein a baflle, attached to and rising from said panel extends parallel with the lower edge of said panel and is disposed adjacent to said discharge opening between said opening and the lower edge of said panel.

3. A roof ventilator according to claim 1 wherein said discharge opening is formed by a transverse portion struckup from said panel and defining a louver, the upper wall of which is directed upwardly toward the lower edge of said panel.

4. A roof ventilator according to claim 1 wherein a baffle is disposed adjacent said discharge opening between said opening and the lower edge of said panel, and said discharge opening is formed by a transverse portion struckup from said panel and defining a louver the upper wall of which is directed upwardly toward the lower edge of said panel.

5. A roof ventilator according to claim 1 wherein a pair of baflles, attached to and rising from said panel,

Patented Mar. 7, 1961.

walls the planes of which are directed upwardly toward the upper edge of said panel to form deflectors over the openings formed by the struckup portions, tending to prevent entry of snow and the like into the openings when blown upwardly along the roof, and a duct depending from said panel and underlying the louvers, said duct comprising triangular sidewalls depending from said panel, a downwardly and forwardly inclined bottom wall merging with said panel adjacent its lower edge, an open wall at the opposite end, and a front discharge opening adjacent said merged panel and bottom wall to enable draining on to the roof of any liquid flowing on said bottom wall.

7. A roof ventilator according to claim 6 wherein a 4 bafiie, attached to and rising from said panel, extends parallel with the lower edge thereof and disposed adjacent to said discharge opening between said opening and the lower edge of said panels.

8. A roof ventilator according to claim 6 wherein a bafiie, attached to said panel, extends parallel with the upper edge thereof and disposed between the upper edge of the panel and the louvers.

References Cited in the file of this patent UNITED STATES PATENTS 

